Hamburg finished just one place above the relegation zone this season, and it
acted quickly to strengthen its side.
The 27-year-old Adler was on pace to be Germany's No. 1 goalkeeper just a few
years ago, but has been hindered by injury since. He departs Bayer Leverkusen
on a free transfer to join Hamburg.
'If you have the chance to sign a German international goalkeeper at the age
of 27 on a free transfer, that's an opportunity you can't afford to miss. You
have to pounce,' Hamburg sporting director Frank Arnesen said.
Adler has played 10 times for Germany.
On the attacking end, Rudnevs makes the switch from Polish side Lech Poznan.
He scored 22 goals in 29 league games for the club, and Arnesen described him
as a "real poacher."